1966 — The NFL and AFL announced plans to merger by 1970. The leagues also agreed to begin playing the AFL-NFL World Championship Game, later known as the Super Bowl. (More info.)

1969 — The New York Yankees hosted Mickey Mantle Day, when the team retired the No. 7 jersey of the future Hall of Fame slugger. (More info.)

1982 — The Los Angeles Lakers beat the Philadelphia 76ers, four games to tow, to win the NBA Championship. (More info.)

1986 — The Boston Celtics beat the Houston Rockets in the sixth game of the series to win the NBA Championship. (More info.)

1991 — Former New York Jets defensive lineman Mark Gastineau won his first pro boxing fight by knocking out Derrick Dukes in 12 seconds. (More info.)

1992 — Pitcher Steve Howe, then of the New York Yankees, was banned from Major League Baseball for a seventh time because of drug use. Howe was the first to be banned for life because of drugs, but he was later reinstated. (More info.)